Currently on ADSL Max package with BT Broadband, syncing at 7mbs, as we are less than 1/2 mile to the exchange, in a modern development - nice steady connection, with no disruption

My question is that whilst I assume there is a potential speed gain with the 21CN upgrade, what sort of real life gains can be expected, and what, if anything, do I need to do with BT to upgrade the account?

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.